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Categories: Physical Item; Tags: Age date
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Categories: Physical Item; Tags: Age date
K20 measurements were made in duplicate on each of two separate splits of sample powder by flame photometry after lithium metaborate fusion and dissolution. Ar analyses were by isotope-dilution mass spectrometry using a high-purity (>99.9%), 38Ar tracer. All samples for Ar extraction were baked overnight at 280
Categories: Physical Item; Tags: Age date
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Categories: Physical Item; Tags: Age date
Standard isotope dilution techniques were used for the argon determinations; the potassium determinations were done by flame photometry using a lithium internal standard.
Categories: Physical Item; Tags: Age date
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Categories: Physical Item; Tags: Age date
A detailed analysis description is unavailable.
Categories: Physical Item; Tags: Age date
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Categories: Physical Item; Tags: Age date
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Categories: Physical Item; Tags: Age date
Potassium was determined by flame photometry using a lithium metaborate fusion technique (Engels and Ingamells, 1970). Argon extraction and measurement was accomplished using standard techniques of isotope dilution mass spectrometry, as described by Dalrymple and Lanphere (1969).
Categories: Physical Item; Tags: Age date
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Categories: Physical Item; Tags: Age date
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Categories: Physical Item; Tags: Age date
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Categories: Physical Item; Tags: Age date
Lead isotopic compositoins, measured on an NBS 30.5 cm mass spectrometer
Categories: Physical Item; Tags: Age date
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Categories: Physical Item; Tags: Age date
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Categories: Physical Item; Tags: Age date
K analyzed with an Instrumetation Laboratories Model 343 digital flame photometer, using the LiBO2 fluxfusion technique and mineral calibration standards, by Genevieve Edsall. Ar was determined by isotope dilution using Ar38 tracers and a six inch radius Nuclide mass spectrometer equipped with automated peak steppping and digital data acquisition system, by D.L. Turner and Wilfrid D. Davis.
Categories: Physical Item; Tags: Age date
K analyzed with an Instrumetation Laboratories Model 343 digital flame photometer, using the LiBO2 fluxfusion technique and mineral calibration standards, by Genevieve Edsall. Ar was determined by isotope dilution using Ar38 tracers and a six inch radius Nuclide mass spectrometer equipped with automated peak steppping and digital data acquisition system, by D.L. Turner and Wilfrid D. Davis.
Categories: Physical Item; Tags: Age date
A detailed analysis description is unavailable.
Categories: Physical Item; Tags: Age date
A detailed analysis description is unavailable.
Categories: Physical Item; Tags: Age date


map background search result map search result map K-Ar analysis of sample 1933 K-Ar analysis of sample 49CAc78-1 K-Ar analysis of sample 65APa52A K-Ar analysis of sample 67APr57B1 K-Ar analysis of sample 68ABg608 K-Ar analysis of sample 68APs57F K-Ar analysis of sample 68ARh364A K-Ar analysis of sample 70AR116 K-Ar analysis of sample 70AR147 K-Ar analysis of sample 77AWs183 K-Ar analysis of sample 77SJ903B K-Ar analysis of sample 78AH69B K-Ar analysis of sample 78APa151 K-Ar analysis of sample 82DNS193 K-Ar analysis of sample 86BT094 K-Ar analysis of sample 87ANk025R K-Ar analysis of sample AA38 K-Ar analysis of sample K-2288 K-Ar analysis of sample OFFSH1 K-Ar analysis of sample SHR123